Heat a large frying pan over medium-low heat. Meanwhile, spread half of the butter on one side of each slice of bread.

Once the pan is warm, add 1 slice of bread, buttered side down, then top with half of the cheese, all of the pear slices, and finally the remaining cheese. Close with the second slice of bread, buttered side up.

Cook until the bread is toasted and the cheese is melted, about 6 minutes per side.